<template>
	<view>
		<view class="scroll-view-container">
			<scroll-view class="left-scroll-view" scroll-y="true" :style="{height: wh + 'px'}">
				<view :class="['left-scroll-view-item',i===active?'active':'']" v-for="(item,i) in cateList" :key="i" @click="gaiactive(i)">{{item.cat_name}}</view>
			</scroll-view>
			<scroll-view scroll-y="true" :scroll-top="scroll" :style="{height: wh + 'px'}">
				<view class="cate-lv2" v-for="(item2,i2) in cateList2" :key="i2">
					<view class="cate-lv2-title">/{{item2.cat_name}}/</view>
					<view class="cate-lv3">
						<view class="cate-lv3-list" @click="gotoGoodsList(item3)" v-for="(item3,i3) in item2.children" :key="i3">
							<image :src="item3.cat_icon" ></image>
							<text>{{item3.cat_name}}</text>
						</view>
					</view>
				</view>
			</scroll-view>
		</view>
	</view>
</template>

<script>
	export default {
		data() {
			return {
				wh:0,
				cateList:[],
				active:0,
				//二级分类列表
				cateList2:[],
				scroll:0
			};
		},
		onLoad() {
			const sysInfo = uni.getSystemInfoSync()
			this.wh = sysInfo.windowHeight
			this.getCateList()
		},
		methods:{
			async getCateList(){
			const {data:res} = 	await uni.$http.get('/api/public/v1/categories')
			if(res.meta.status != 200) return uni.$showMsg
			this.cateList = res.message
			this.cateList2 = res.message[0].children
			},
			gaiactive(i){
				this.active = i
				this.cateList2 = this.cateList[i].children
				this.scroll = this.scroll === 0 ? 1 : 0
			},
			gotoGoodsList(item3){
				uni.navigateTo({
					url:'/subpkg/goods_list/goods_list?cid=' + item3.cat_id
				})
			}
		}
	}
</script>

<style lang="scss">
.scroll-view-container {
	display: flex;
	
	.left-scroll-view {
		width: 120px;
	}
	
	.left-scroll-view-item{
		background-color: #f7f7f7;
		line-height: 60px;
		text-align: center;
		font-size: 12px;
		
		&.active {
			background-color: #ffffff;
			position: relative;
			
			&::before {
				content: '';
				display: block;
				width: 3px;
				height: 30px;
				background-color: #c00000;
				position: absolute;
				top: 50%;
				left: 0;
				transform: translateY(-50%);
			}
		}
	}
}
.cate-lv2-title{
	font-size: 12px;
	font-weight: bold;
	text-align: center;
	padding: 15px 0;
}
.cate-lv3 {
	display: flex;
	flex-wrap: wrap;
	.cate-lv3-list{
		display: flex;
		flex-direction: column;
		align-items: center;
		justify-content: center;
		width: 33.3%;
		margin-bottom: 10px;
		image {
			width: 60px;
			height: 60px;
		}
		text {
			font-size: 12px;
		}
	}
}
</style>
